A nonuniform modulated complex lapped transform

Author

Xiong, Zixiang ; Malvar, S.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

8

Issue

9

fYear

2001

Firstpage

257

Lastpage

260

Abstract

A nonuniform modulated complex lapped transform (NMCLT) is introduced in this paper as a two-stage extension of the modulated complex lapped transform (MCLT). The NMCLT is a new nonuniform oversampled filter bank with a better combination of time- and frequency-domain localization than previous designs, Adaptive nonuniform subband decompositions can be easily generated by varying the number of coefficients brought to the second stage on a frame-by-frame basis. The NMCLT is ideally suited for processing wideband signals such as audio, with reduced time-spreading artifacts.

Keywords

adaptive signal processing; audio signal processing; channel bank filters; modulation; transforms; MCLT; NMCLT; adaptive nonuniform subband decompositions; audio; frequency-domain localization; modulated complex lapped transform; nonuniform modulated complex lapped transform; nonuniform oversampled filter bank; reduced time-spreading artifacts; time-domain localization; wideband signals; Audio coding; Digital audio players; Discrete cosine transforms; Discrete transforms; Filter bank; Frequency; Merging; Switches; Time domain analysis; Wavelet packets;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/97.948450

Filename

948450